COMPACT RECTIFIER FOR WAG7 LOCOMOTIVES WITH IMPROVED HEAT SINK AND LAYOUT DIODE HEAT SINK ASSEMBLY AND BUSBAR

摘要

Compact rectifier for WAG7 locomotive with improved heat sink and layout of diode heat sink assembly and bus bars, the rectifier having four compact diode heat sink modules (1) in each arm of the rectifier, fuses D3 being mounted on the AC bus bar (D4) and connected in series with individual diodes on diode heat sink module (1), said AC bus bars being placed between two arms of the rectifier and electrically connected to the same phase, DC bus bars (D2) being placed on either side of the said diode heat sink modules and connections to both AC and DC bus bars being made with flexible copper braided shunts (D5, D6), characterized in that in the improved layout same potential heat sinks and bus bars are placed in close proximity, thereby eliminating electrical insulation and reducing electric flashover due to creepage.